INDEX 



[The names of species, genera, families, orders, etc., are printed 

 in Italics.] 



: Abbreviation in development, 262 



Abdomen, of crayfish, 113 



of cockroach, 155, 157 

 Abdominal pores, 204 

 Acanthias vulgaris, 203 

 Acicula, 49 



Acniica, 84 

 . Acromion, 292 



Aclinotrichia, 217 

 I Afferent branchial arteries, 225, 272 



Ala cordis, 101, 129 



Albumen gland, 8 1 



Alimentary canal, of Distomum, 



3, 7 



of Earthworm, 21 



- of Anodonla, 58 



of Helix, 76 



of cockroach, 157 



of Amphioxus, 1 79 



of dogfish, 218 



- of mammals, 288 

 Allantoidean placenta, 304 



Allantois, 304 



f Alternation of generations, 14 



Ametabola, 170 



Amnion, 1 66, 301 

 | Amniotic cavity, 301 



Amphicoelous vertebrae, 2IO 

 ' Amphioxus, 172 



Annelida, 45 

 f Annuli, 91, 94 



Anodonta cygnea, 53~68 



Antennae, 95, 100, 107, no, 117, 

 123, 142, 152, 168 



Apus cancrifonnis, 92- 1 1 1 



gladalis, 1 05- 1 06 



105 



Appendages of Apus, 95 

 . Appendicular skeleton, 209, 216 

 Aquedtictus vestibuli, 21 1 

 Archenteron, 190 



313 



Archiannelida, 45 



Archigcetes, 2 



Arterial arches, of frog, 272 



of mammals, 294 



Arteries, of crayfish, 129 



of dogfish, 225 



Arthrobranchite, 131, 132 

 Arthropoda, 91, 150 

 Asddia, 202 



Asymmetry in Amphioxus, 196 

 Atrial folds, 197 

 Atriopore, 175, 197 

 Atrium, 175, 181 

 Auditory capsules, 211 



nerve, 238 



organs, 124, 136, 245, 279, 286 



ossicles, 291 

 Auricle, 224 

 Axial skeleton, 209 

 Azygos nerve, 136 

 vein, 296 



Basibranchial cartilage, 215 



Basihyal cartilage, 215 



Basi-occipital bone, 290 



Basipodite, 117 



Basipterygium, 216 



Basisphenoid bone, 290 



Bilateral symmetry, I 



Bile duct, 219 



Blastocu-le, 48, 190, 250, 254, 256 



Blastocyst, 300 



Blastoderm, 165 



Blastopore, 38, 141, 166, 192, 247, 

 250, 254 



Blastula, 36, 190, 247 



Blood - vascular system, of earth- 

 worm, 27 



of crayfish, 129, 132 



of Amphioxus, 184 

 Botryoidal tissue, 49 



